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Buffer overflow in the authentication function for Microsoft SQL Server 2000 and Microsoft Desktop Engine (MSDE) 2000 allows remote attackers to execute arbitrary code via a long request to TCP port 1433, aka the "Hello" overflow.
Use Microsoft vendor hub and Data Engine product page to widen CVE-2002-1123 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2002-1145, CVE-2002-0721 and CVE-2008-0107 for nearby disclosures in the same product family. Additional editorial context is available in Weekly Security Roundup: Navigating the April 2026 Threat Landscape and Critical Framework Exploits.